Annotation of mandoc/term.c, Revision 1.144
1.144 ! kristaps 1: /* $Id: term.c,v 1.143 2010/06/07 21:03:02 kristaps Exp $ */
1.1 kristaps 2: /*
1.75 kristaps 3: * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
1.1 kristaps 4: *
5: * Permission to use, copy, modify, and distribute this software for any
1.74 kristaps 6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
1.1 kristaps 8: *
1.74 kristaps 9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1 kristaps 16: */
1.128 kristaps 17: #ifdef HAVE_CONFIG_H
18: #include "config.h"
19: #endif
20:
1.126 kristaps 21: #include <sys/types.h>
22:
1.1 kristaps 23: #include <assert.h>
1.122 kristaps 24: #include <ctype.h>
1.144 ! kristaps 25: #include <getopt.h>
1.141 kristaps 26: #include <stdint.h>
1.22 kristaps 27: #include <stdio.h>
1.1 kristaps 28: #include <stdlib.h>
29: #include <string.h>
1.113 kristaps 30: #include <time.h>
1.1 kristaps 31:
1.137 kristaps 32: #include "mandoc.h"
1.101 kristaps 33: #include "chars.h"
1.107 kristaps 34: #include "out.h"
1.71 kristaps 35: #include "term.h"
36: #include "man.h"
37: #include "mdoc.h"
1.105 kristaps 38: #include "main.h"
1.1 kristaps 39:
1.142 kristaps 40: #define PS_CHAR_WIDTH 6
41: #define PS_CHAR_HEIGHT 12
42: #define PS_CHAR_TOPMARG (792 - 24)
43: #define PS_CHAR_TOP (PS_CHAR_TOPMARG - 36)
44: #define PS_CHAR_LEFT 36
45: #define PS_CHAR_BOTMARG 24
46: #define PS_CHAR_BOT (PS_CHAR_BOTMARG + 36)
47:
48: static struct termp *alloc(char *, enum termenc, enum termtype);
1.71 kristaps 49: static void term_free(struct termp *);
1.125 kristaps 50: static void spec(struct termp *, const char *, size_t);
51: static void res(struct termp *, const char *, size_t);
52: static void buffera(struct termp *, const char *, size_t);
53: static void bufferc(struct termp *, char);
54: static void adjbuf(struct termp *p, size_t);
55: static void encode(struct termp *, const char *, size_t);
1.142 kristaps 56: static void advance(struct termp *, size_t);
57: static void endline(struct termp *);
58: static void letter(struct termp *, char);
59: static void pageopen(struct termp *);
1.1 kristaps 60:
61:
1.71 kristaps 62: void *
1.141 kristaps 63: ascii_alloc(char *outopts)
1.10 kristaps 64: {
1.1 kristaps 65:
1.142 kristaps 66: return(alloc(outopts, TERMENC_ASCII, TERMTYPE_CHAR));
67: }
68:
69:
70: void *
71: ps_alloc(void)
72: {
73:
74: return(alloc(NULL, TERMENC_ASCII, TERMTYPE_PS));
1.1 kristaps 75: }
76:
77:
1.99 kristaps 78: void
1.71 kristaps 79: terminal_free(void *arg)
1.11 kristaps 80: {
81:
1.71 kristaps 82: term_free((struct termp *)arg);
1.11 kristaps 83: }
84:
85:
1.71 kristaps 86: static void
87: term_free(struct termp *p)
1.14 kristaps 88: {
89:
1.71 kristaps 90: if (p->buf)
91: free(p->buf);
1.102 kristaps 92: if (p->symtab)
1.101 kristaps 93: chars_free(p->symtab);
1.142 kristaps 94: free(p);
95: }
96:
97:
98: /*
99: * Push a single letter into our output engine.
100: */
101: static void
102: letter(struct termp *p, char c)
103: {
104:
105: if (TERMTYPE_CHAR == p->type) {
106: /*
107: * If using the terminal device, just push the letter
108: * out into the screen.
109: */
110: putchar(c);
111: return;
112: }
113:
114: if ( ! (PS_INLINE & p->psstate)) {
115: /*
116: * If we're not in a PostScript "word" context, then
117: * open one now at the current cursor.
118: */
119: printf("%zu %zu moveto\n", p->pscol, p->psrow);
120: putchar('(');
121: p->psstate |= PS_INLINE;
122: }
123:
124: /*
125: * We need to escape these characters as per the PostScript
126: * specification. We would also escape non-graphable characters
127: * (like tabs), but none of them would get to this point and
128: * it's superfluous to abort() on them.
129: */
130:
131: switch (c) {
132: case ('('):
133: /* FALLTHROUGH */
134: case (')'):
135: /* FALLTHROUGH */
136: case ('\\'):
137: putchar('\\');
138: break;
139: default:
140: break;
141: }
142:
143: /* Write the character and adjust where we are on the page. */
144: putchar(c);
145: p->pscol += PS_CHAR_WIDTH;
146: }
147:
148:
149: /*
150: * Begin a "terminal" context. Since terminal encompasses PostScript,
151: * the actual terminal, etc., there are a few things we can do here.
152: */
153: void
154: term_begin(struct termp *p, term_margin head,
155: term_margin foot, const void *arg)
156: {
157:
158: p->headf = head;
159: p->footf = foot;
160: p->argf = arg;
161:
162: if (TERMTYPE_CHAR == p->type) {
163: /* Emit the header and be done. */
164: (*p->headf)(p, p->argf);
165: return;
166: }
167:
168: /*
169: * Emit the standard PostScript prologue, set our initial page
170: * position, then run pageopen() on the initial page.
171: */
172:
173: printf("%s\n", "%!PS");
174: printf("%s\n", "/Courier");
175: printf("%s\n", "10 selectfont");
176:
177: p->pspage = 1;
178: p->psstate = 0;
179: pageopen(p);
180: }
181:
182:
183: /*
184: * Open a page. This is only used for -Tps at the moment. It opens a
185: * page context, printing the header and the footer. THE OUTPUT BUFFER
186: * MUST BE EMPTY. If it is not, output will ghost on the next line and
187: * we'll be all gross and out of state.
188: */
189: static void
190: pageopen(struct termp *p)
191: {
192:
193: assert(TERMTYPE_PS == p->type);
194: assert(0 == p->psstate);
195:
196: p->pscol = PS_CHAR_LEFT;
197: p->psrow = PS_CHAR_TOPMARG;
198: p->psstate |= PS_MARGINS;
199:
200: (*p->headf)(p, p->argf);
201: endline(p);
202:
203: p->psstate &= ~PS_MARGINS;
204: assert(0 == p->psstate);
1.14 kristaps 205:
1.142 kristaps 206: p->pscol = PS_CHAR_LEFT;
207: p->psrow = PS_CHAR_BOTMARG;
208: p->psstate |= PS_MARGINS;
209:
210: (*p->footf)(p, p->argf);
211: endline(p);
212:
213: p->psstate &= ~PS_MARGINS;
214: assert(0 == p->psstate);
215:
216: p->pscol = PS_CHAR_LEFT;
217: p->psrow = PS_CHAR_TOP;
218:
219: }
220:
221:
222: void
223: term_end(struct termp *p)
224: {
225:
226: if (TERMTYPE_CHAR == p->type) {
227: (*p->footf)(p, p->argf);
228: return;
229: }
230:
231: printf("%s\n", "%%END");
232: }
233:
234:
235: static void
236: endline(struct termp *p)
237: {
238:
239: if (TERMTYPE_CHAR == p->type) {
240: putchar('\n');
241: return;
242: }
243:
244: if (PS_INLINE & p->psstate) {
245: printf(") show\n");
246: p->psstate &= ~PS_INLINE;
247: }
248:
249: if (PS_MARGINS & p->psstate)
250: return;
251:
252: p->pscol = PS_CHAR_LEFT;
253: if (p->psrow >= PS_CHAR_HEIGHT + PS_CHAR_BOT) {
254: p->psrow -= PS_CHAR_HEIGHT;
255: return;
256: }
257:
258: /*
259: * XXX: can't run pageopen() until we're certain a flushln() has
260: * occured, else the buf will reopen in an awkward state on the
261: * next line.
262: */
263: printf("showpage\n");
264: p->psrow = PS_CHAR_TOP;
265: }
266:
267:
268: /*
269: * Advance the output engine by a certain amount of whitespace.
270: */
271: static void
272: advance(struct termp *p, size_t len)
273: {
274: size_t i;
275:
276: if (TERMTYPE_CHAR == p->type) {
277: /* Just print whitespace on the terminal. */
278: for (i = 0; i < len; i++)
279: putchar(' ');
280: return;
281: }
282:
283: if (PS_INLINE & p->psstate) {
284: /* Dump out any existing line scope. */
285: printf(") show\n");
286: p->psstate &= ~PS_INLINE;
287: }
288:
289: p->pscol += len ? len * PS_CHAR_WIDTH : 0;
1.14 kristaps 290: }
291:
292:
1.71 kristaps 293: static struct termp *
1.142 kristaps 294: alloc(char *outopts, enum termenc enc, enum termtype type)
1.14 kristaps 295: {
1.141 kristaps 296: struct termp *p;
297: const char *toks[2];
298: char *v;
299: size_t width;
300:
301: toks[0] = "width";
302: toks[1] = NULL;
1.14 kristaps 303:
1.117 kristaps 304: p = calloc(1, sizeof(struct termp));
305: if (NULL == p) {
1.120 kristaps 306: perror(NULL);
1.117 kristaps 307: exit(EXIT_FAILURE);
308: }
1.141 kristaps 309:
1.142 kristaps 310: p->type = type;
1.138 schwarze 311: p->tabwidth = 5;
1.71 kristaps 312: p->enc = enc;
1.142 kristaps 313:
1.141 kristaps 314: width = 80;
315:
316: while (outopts && *outopts)
317: switch (getsubopt(&outopts, UNCONST(toks), &v)) {
318: case (0):
1.143 kristaps 319: width = (size_t)atoi(v);
1.141 kristaps 320: break;
321: default:
322: break;
323: }
324:
1.134 joerg 325: /* Enforce some lower boundary. */
326: if (width < 60)
327: width = 60;
328: p->defrmargin = width - 2;
1.71 kristaps 329: return(p);
1.14 kristaps 330: }
331:
332:
1.71 kristaps 333: /*
334: * Flush a line of text. A "line" is loosely defined as being something
335: * that should be followed by a newline, regardless of whether it's
336: * broken apart by newlines getting there. A line can also be a
1.130 kristaps 337: * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
338: * not have a trailing newline.
1.71 kristaps 339: *
1.130 kristaps 340: * The following flags may be specified:
1.71 kristaps 341: *
342: * - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
343: * offset value. This is useful when doing columnar lists where the
344: * prior column has right-padded.
345: *
346: * - TERMP_NOBREAK: this is the most important and is used when making
347: * columns. In short: don't print a newline and instead pad to the
348: * right margin. Used in conjunction with TERMP_NOLPAD.
349: *
1.91 kristaps 350: * - TERMP_TWOSPACE: when padding, make sure there are at least two
351: * space characters of padding. Otherwise, rather break the line.
352: *
1.84 kristaps 353: * - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
354: * the line is overrun, and don't pad-right if it's underrun.
355: *
356: * - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
357: * overruning, instead save the position and continue at that point
358: * when the next invocation.
1.71 kristaps 359: *
360: * In-line line breaking:
361: *
362: * If TERMP_NOBREAK is specified and the line overruns the right
363: * margin, it will break and pad-right to the right margin after
364: * writing. If maxrmargin is violated, it will break and continue
1.114 kristaps 365: * writing from the right-margin, which will lead to the above scenario
366: * upon exit. Otherwise, the line will break at the right margin.
1.71 kristaps 367: */
368: void
369: term_flushln(struct termp *p)
1.53 kristaps 370: {
1.114 kristaps 371: int i; /* current input position in p->buf */
372: size_t vis; /* current visual position on output */
373: size_t vbl; /* number of blanks to prepend to output */
1.136 schwarze 374: size_t vend; /* end of word visual position on output */
1.114 kristaps 375: size_t bp; /* visual right border position */
376: int j; /* temporary loop index */
1.140 kristaps 377: int jhy; /* last hyphen before line overflow */
1.114 kristaps 378: size_t maxvis, mmax;
1.53 kristaps 379:
1.71 kristaps 380: /*
381: * First, establish the maximum columns of "visible" content.
382: * This is usually the difference between the right-margin and
383: * an indentation, but can be, for tagged lists or columns, a
1.115 kristaps 384: * small set of values.
1.71 kristaps 385: */
1.53 kristaps 386:
1.71 kristaps 387: assert(p->offset < p->rmargin);
1.92 kristaps 388:
1.129 kristaps 389: maxvis = (int)(p->rmargin - p->offset) - p->overstep < 0 ?
1.119 kristaps 390: /* LINTED */
1.129 kristaps 391: 0 : p->rmargin - p->offset - p->overstep;
392: mmax = (int)(p->maxrmargin - p->offset) - p->overstep < 0 ?
1.119 kristaps 393: /* LINTED */
1.129 kristaps 394: 0 : p->maxrmargin - p->offset - p->overstep;
1.92 kristaps 395:
1.71 kristaps 396: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115 kristaps 397:
1.136 schwarze 398: /*
399: * Indent the first line of a paragraph.
400: */
401: vbl = p->flags & TERMP_NOLPAD ? 0 : p->offset;
402:
1.115 kristaps 403: /*
404: * FIXME: if bp is zero, we still output the first word before
405: * breaking the line.
406: */
407:
1.136 schwarze 408: vis = vend = i = 0;
409: while (i < (int)p->col) {
1.71 kristaps 410:
411: /*
1.138 schwarze 412: * Handle literal tab characters.
413: */
414: for (j = i; j < (int)p->col; j++) {
415: if ('\t' != p->buf[j])
416: break;
417: vend = (vis/p->tabwidth+1)*p->tabwidth;
418: vbl += vend - vis;
419: vis = vend;
420: }
421:
422: /*
1.71 kristaps 423: * Count up visible word characters. Control sequences
424: * (starting with the CSI) aren't counted. A space
425: * generates a non-printing word, which is valid (the
426: * space is printed according to regular spacing rules).
427: */
428:
429: /* LINTED */
1.140 kristaps 430: for (jhy = 0; j < (int)p->col; j++) {
1.138 schwarze 431: if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.71 kristaps 432: break;
1.140 kristaps 433: if (8 != p->buf[j]) {
434: if (vend > vis && vend < bp &&
435: ASCII_HYPH == p->buf[j])
436: jhy = j;
437: vend++;
438: } else
1.136 schwarze 439: vend--;
1.71 kristaps 440: }
1.53 kristaps 441:
1.71 kristaps 442: /*
1.81 kristaps 443: * Find out whether we would exceed the right margin.
1.136 schwarze 444: * If so, break to the next line.
1.81 kristaps 445: */
1.140 kristaps 446: if (vend > bp && 0 == jhy && vis > 0) {
1.136 schwarze 447: vend -= vis;
1.142 kristaps 448: endline(p);
1.81 kristaps 449: if (TERMP_NOBREAK & p->flags) {
1.139 schwarze 450: p->viscol = p->rmargin;
1.142 kristaps 451: advance(p, p->rmargin);
1.136 schwarze 452: vend += p->rmargin - p->offset;
1.81 kristaps 453: } else {
1.139 schwarze 454: p->viscol = 0;
1.136 schwarze 455: vbl = p->offset;
1.81 kristaps 456: }
1.130 kristaps 457:
1.129 kristaps 458: /* Remove the p->overstep width. */
1.130 kristaps 459:
1.112 kristaps 460: bp += (int)/* LINTED */
1.129 kristaps 461: p->overstep;
462: p->overstep = 0;
1.71 kristaps 463: }
1.53 kristaps 464:
1.138 schwarze 465: /*
466: * Skip leading tabs, they were handled above.
467: */
468: while (i < (int)p->col && '\t' == p->buf[i])
469: i++;
470:
1.130 kristaps 471: /* Write out the [remaining] word. */
1.136 schwarze 472: for ( ; i < (int)p->col; i++) {
1.140 kristaps 473: if (vend > bp && jhy > 0 && i > jhy)
474: break;
1.138 schwarze 475: if ('\t' == p->buf[i])
476: break;
1.136 schwarze 477: if (' ' == p->buf[i]) {
478: while (' ' == p->buf[i]) {
479: vbl++;
480: i++;
481: }
1.71 kristaps 482: break;
1.136 schwarze 483: }
484: if (ASCII_NBRSP == p->buf[i]) {
485: vbl++;
486: continue;
487: }
1.130 kristaps 488:
1.136 schwarze 489: /*
490: * Now we definitely know there will be
491: * printable characters to output,
492: * so write preceding white space now.
493: */
494: if (vbl) {
1.142 kristaps 495: advance(p, vbl);
1.139 schwarze 496: p->viscol += vbl;
1.136 schwarze 497: vbl = 0;
498: }
1.140 kristaps 499:
500: if (ASCII_HYPH == p->buf[i])
1.142 kristaps 501: letter(p, '-');
1.140 kristaps 502: else
1.142 kristaps 503: letter(p, p->buf[i]);
1.140 kristaps 504:
1.139 schwarze 505: p->viscol += 1;
1.136 schwarze 506: }
507: vend += vbl;
508: vis = vend;
1.71 kristaps 509: }
1.111 kristaps 510:
1.91 kristaps 511: p->col = 0;
1.129 kristaps 512: p->overstep = 0;
1.15 kristaps 513:
1.91 kristaps 514: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 515: p->viscol = 0;
1.142 kristaps 516: endline(p);
1.15 kristaps 517: return;
1.71 kristaps 518: }
1.15 kristaps 519:
1.91 kristaps 520: if (TERMP_HANG & p->flags) {
521: /* We need one blank after the tag. */
1.129 kristaps 522: p->overstep = /* LINTED */
1.92 kristaps 523: vis - maxvis + 1;
1.91 kristaps 524:
525: /*
526: * Behave exactly the same way as groff:
1.92 kristaps 527: * If we have overstepped the margin, temporarily move
528: * it to the right and flag the rest of the line to be
529: * shorter.
1.91 kristaps 530: * If we landed right at the margin, be happy.
1.92 kristaps 531: * If we are one step before the margin, temporarily
532: * move it one step LEFT and flag the rest of the line
533: * to be longer.
1.91 kristaps 534: */
1.129 kristaps 535: if (p->overstep >= -1) {
536: assert((int)maxvis + p->overstep >= 0);
1.92 kristaps 537: /* LINTED */
1.129 kristaps 538: maxvis += p->overstep;
1.92 kristaps 539: } else
1.129 kristaps 540: p->overstep = 0;
1.91 kristaps 541:
542: } else if (TERMP_DANGLE & p->flags)
543: return;
1.15 kristaps 544:
1.92 kristaps 545: /* Right-pad. */
546: if (maxvis > vis + /* LINTED */
1.139 schwarze 547: ((TERMP_TWOSPACE & p->flags) ? 1 : 0)) {
548: p->viscol += maxvis - vis;
1.142 kristaps 549: advance(p, maxvis - vis);
550: vis += (maxvis - vis);
1.139 schwarze 551: } else { /* ...or newline break. */
1.142 kristaps 552: endline(p);
1.139 schwarze 553: p->viscol = p->rmargin;
1.142 kristaps 554: advance(p, p->rmargin);
1.91 kristaps 555: }
1.15 kristaps 556: }
557:
558:
1.71 kristaps 559: /*
560: * A newline only breaks an existing line; it won't assert vertical
561: * space. All data in the output buffer is flushed prior to the newline
562: * assertion.
563: */
564: void
565: term_newln(struct termp *p)
1.15 kristaps 566: {
567:
1.71 kristaps 568: p->flags |= TERMP_NOSPACE;
1.139 schwarze 569: if (0 == p->col && 0 == p->viscol) {
1.71 kristaps 570: p->flags &= ~TERMP_NOLPAD;
1.15 kristaps 571: return;
1.16 kristaps 572: }
1.71 kristaps 573: term_flushln(p);
574: p->flags &= ~TERMP_NOLPAD;
1.16 kristaps 575: }
576:
577:
1.71 kristaps 578: /*
579: * Asserts a vertical space (a full, empty line-break between lines).
580: * Note that if used twice, this will cause two blank spaces and so on.
581: * All data in the output buffer is flushed prior to the newline
582: * assertion.
583: */
584: void
585: term_vspace(struct termp *p)
1.16 kristaps 586: {
587:
1.62 kristaps 588: term_newln(p);
1.139 schwarze 589: p->viscol = 0;
1.142 kristaps 590: endline(p);
1.16 kristaps 591: }
592:
593:
1.71 kristaps 594: static void
1.125 kristaps 595: spec(struct termp *p, const char *word, size_t len)
1.17 kristaps 596: {
1.71 kristaps 597: const char *rhs;
598: size_t sz;
1.17 kristaps 599:
1.101 kristaps 600: rhs = chars_a2ascii(p->symtab, word, len, &sz);
1.125 kristaps 601: if (rhs)
602: encode(p, rhs, sz);
1.94 kristaps 603: }
604:
605:
606: static void
1.125 kristaps 607: res(struct termp *p, const char *word, size_t len)
1.94 kristaps 608: {
609: const char *rhs;
610: size_t sz;
611:
1.101 kristaps 612: rhs = chars_a2res(p->symtab, word, len, &sz);
1.125 kristaps 613: if (rhs)
614: encode(p, rhs, sz);
615: }
616:
617:
618: void
619: term_fontlast(struct termp *p)
620: {
621: enum termfont f;
622:
623: f = p->fontl;
624: p->fontl = p->fontq[p->fonti];
625: p->fontq[p->fonti] = f;
626: }
627:
628:
629: void
630: term_fontrepl(struct termp *p, enum termfont f)
631: {
632:
633: p->fontl = p->fontq[p->fonti];
634: p->fontq[p->fonti] = f;
635: }
636:
637:
638: void
639: term_fontpush(struct termp *p, enum termfont f)
640: {
641:
642: assert(p->fonti + 1 < 10);
643: p->fontl = p->fontq[p->fonti];
644: p->fontq[++p->fonti] = f;
645: }
646:
647:
648: const void *
649: term_fontq(struct termp *p)
650: {
651:
652: return(&p->fontq[p->fonti]);
653: }
654:
655:
656: enum termfont
657: term_fonttop(struct termp *p)
658: {
659:
660: return(p->fontq[p->fonti]);
661: }
662:
663:
664: void
665: term_fontpopq(struct termp *p, const void *key)
666: {
667:
668: while (p->fonti >= 0 && key != &p->fontq[p->fonti])
669: p->fonti--;
670: assert(p->fonti >= 0);
671: }
1.94 kristaps 672:
1.125 kristaps 673:
674: void
675: term_fontpop(struct termp *p)
676: {
677:
678: assert(p->fonti);
679: p->fonti--;
1.17 kristaps 680: }
681:
682:
1.71 kristaps 683: /*
684: * Handle pwords, partial words, which may be either a single word or a
685: * phrase that cannot be broken down (such as a literal string). This
686: * handles word styling.
687: */
1.86 kristaps 688: void
689: term_word(struct termp *p, const char *word)
1.65 kristaps 690: {
1.124 kristaps 691: const char *sv, *seq;
1.125 kristaps 692: int sz;
1.124 kristaps 693: size_t ssz;
694: enum roffdeco deco;
1.71 kristaps 695:
1.100 kristaps 696: sv = word;
697:
1.123 kristaps 698: if (word[0] && '\0' == word[1])
1.100 kristaps 699: switch (word[0]) {
700: case('.'):
701: /* FALLTHROUGH */
702: case(','):
703: /* FALLTHROUGH */
704: case(';'):
705: /* FALLTHROUGH */
706: case(':'):
707: /* FALLTHROUGH */
708: case('?'):
709: /* FALLTHROUGH */
710: case('!'):
711: /* FALLTHROUGH */
712: case(')'):
713: /* FALLTHROUGH */
714: case(']'):
715: if ( ! (TERMP_IGNDELIM & p->flags))
716: p->flags |= TERMP_NOSPACE;
717: break;
718: default:
719: break;
720: }
1.65 kristaps 721:
1.133 kristaps 722: if ( ! (TERMP_NOSPACE & p->flags)) {
1.125 kristaps 723: bufferc(p, ' ');
1.133 kristaps 724: if (TERMP_SENTENCE & p->flags)
725: bufferc(p, ' ');
726: }
1.65 kristaps 727:
1.71 kristaps 728: if ( ! (p->flags & TERMP_NONOSPACE))
729: p->flags &= ~TERMP_NOSPACE;
1.133 kristaps 730:
731: p->flags &= ~TERMP_SENTENCE;
1.65 kristaps 732:
1.125 kristaps 733: /* FIXME: use strcspn. */
1.124 kristaps 734:
735: while (*word) {
736: if ('\\' != *word) {
1.125 kristaps 737: encode(p, word, 1);
1.124 kristaps 738: word++;
739: continue;
740: }
741:
742: seq = ++word;
743: sz = a2roffdeco(&deco, &seq, &ssz);
744:
745: switch (deco) {
746: case (DECO_RESERVED):
1.125 kristaps 747: res(p, seq, ssz);
1.124 kristaps 748: break;
749: case (DECO_SPECIAL):
1.125 kristaps 750: spec(p, seq, ssz);
1.124 kristaps 751: break;
752: case (DECO_BOLD):
1.125 kristaps 753: term_fontrepl(p, TERMFONT_BOLD);
1.124 kristaps 754: break;
755: case (DECO_ITALIC):
1.125 kristaps 756: term_fontrepl(p, TERMFONT_UNDER);
1.124 kristaps 757: break;
758: case (DECO_ROMAN):
1.125 kristaps 759: term_fontrepl(p, TERMFONT_NONE);
1.124 kristaps 760: break;
761: case (DECO_PREVIOUS):
1.125 kristaps 762: term_fontlast(p);
1.124 kristaps 763: break;
764: default:
765: break;
766: }
1.127 kristaps 767:
1.124 kristaps 768: word += sz;
1.127 kristaps 769: if (DECO_NOSPACE == deco && '\0' == *word)
770: p->flags |= TERMP_NOSPACE;
1.124 kristaps 771: }
1.65 kristaps 772:
1.131 kristaps 773: /*
774: * Note that we don't process the pipe: the parser sees it as
775: * punctuation, but we don't in terms of typography.
776: */
1.100 kristaps 777: if (sv[0] && 0 == sv[1])
778: switch (sv[0]) {
779: case('('):
780: /* FALLTHROUGH */
781: case('['):
782: p->flags |= TERMP_NOSPACE;
783: break;
784: default:
785: break;
786: }
1.65 kristaps 787: }
788:
789:
1.71 kristaps 790: static void
1.125 kristaps 791: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 792: {
793:
1.125 kristaps 794: if (0 == p->maxcols)
795: p->maxcols = 1024;
796: while (sz >= p->maxcols)
797: p->maxcols <<= 2;
798:
799: p->buf = realloc(p->buf, p->maxcols);
800: if (NULL == p->buf) {
801: perror(NULL);
802: exit(EXIT_FAILURE);
1.71 kristaps 803: }
1.51 kristaps 804: }
805:
1.79 kristaps 806:
807: static void
1.125 kristaps 808: buffera(struct termp *p, const char *word, size_t sz)
1.79 kristaps 809: {
1.125 kristaps 810:
811: if (p->col + sz >= p->maxcols)
812: adjbuf(p, p->col + sz);
813:
1.126 kristaps 814: memcpy(&p->buf[(int)p->col], word, sz);
1.125 kristaps 815: p->col += sz;
816: }
817:
818:
819: static void
820: bufferc(struct termp *p, char c)
821: {
822:
823: if (p->col + 1 >= p->maxcols)
824: adjbuf(p, p->col + 1);
825:
1.126 kristaps 826: p->buf[(int)p->col++] = c;
1.125 kristaps 827: }
828:
829:
830: static void
831: encode(struct termp *p, const char *word, size_t sz)
832: {
833: enum termfont f;
834: int i;
835:
836: /*
837: * Encode and buffer a string of characters. If the current
838: * font mode is unset, buffer directly, else encode then buffer
839: * character by character.
840: */
841:
1.142 kristaps 842: if (TERMTYPE_PS == p->type) {
843: buffera(p, word, sz);
844: return;
845: } else if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.125 kristaps 846: buffera(p, word, sz);
847: return;
848: }
849:
850: for (i = 0; i < (int)sz; i++) {
851: if ( ! isgraph((u_char)word[i])) {
852: bufferc(p, word[i]);
853: continue;
1.79 kristaps 854: }
1.125 kristaps 855:
856: if (TERMFONT_UNDER == f)
857: bufferc(p, '_');
858: else
859: bufferc(p, word[i]);
860:
861: bufferc(p, 8);
862: bufferc(p, word[i]);
1.79 kristaps 863: }
864: }
1.106 kristaps 865:
866:
1.107 kristaps 867: size_t
868: term_vspan(const struct roffsu *su)
1.106 kristaps 869: {
870: double r;
871:
1.107 kristaps 872: switch (su->unit) {
1.106 kristaps 873: case (SCALE_CM):
1.107 kristaps 874: r = su->scale * 2;
1.106 kristaps 875: break;
876: case (SCALE_IN):
1.107 kristaps 877: r = su->scale * 6;
1.106 kristaps 878: break;
879: case (SCALE_PC):
1.107 kristaps 880: r = su->scale;
1.106 kristaps 881: break;
882: case (SCALE_PT):
1.107 kristaps 883: r = su->scale / 8;
1.106 kristaps 884: break;
885: case (SCALE_MM):
1.107 kristaps 886: r = su->scale / 1000;
1.106 kristaps 887: break;
888: case (SCALE_VS):
1.107 kristaps 889: r = su->scale;
1.106 kristaps 890: break;
891: default:
1.107 kristaps 892: r = su->scale - 1;
1.106 kristaps 893: break;
894: }
895:
896: if (r < 0.0)
897: r = 0.0;
1.107 kristaps 898: return(/* LINTED */(size_t)
1.106 kristaps 899: r);
900: }
901:
902:
1.107 kristaps 903: size_t
904: term_hspan(const struct roffsu *su)
1.106 kristaps 905: {
906: double r;
907:
1.108 kristaps 908: /* XXX: CM, IN, and PT are approximations. */
909:
1.107 kristaps 910: switch (su->unit) {
1.106 kristaps 911: case (SCALE_CM):
1.108 kristaps 912: r = 4 * su->scale;
1.106 kristaps 913: break;
914: case (SCALE_IN):
1.108 kristaps 915: /* XXX: this is an approximation. */
916: r = 10 * su->scale;
1.106 kristaps 917: break;
918: case (SCALE_PC):
1.108 kristaps 919: r = (10 * su->scale) / 6;
1.106 kristaps 920: break;
921: case (SCALE_PT):
1.108 kristaps 922: r = (10 * su->scale) / 72;
1.106 kristaps 923: break;
924: case (SCALE_MM):
1.107 kristaps 925: r = su->scale / 1000; /* FIXME: double-check. */
1.106 kristaps 926: break;
927: case (SCALE_VS):
1.107 kristaps 928: r = su->scale * 2 - 1; /* FIXME: double-check. */
1.106 kristaps 929: break;
930: default:
1.107 kristaps 931: r = su->scale;
1.106 kristaps 932: break;
933: }
934:
935: if (r < 0.0)
936: r = 0.0;
1.107 kristaps 937: return((size_t)/* LINTED */
1.106 kristaps 938: r);
939: }
940:
941:
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