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1.2 ! schwarze 1: /* $Id: html.c,v 1.1 2009/10/21 19:13:50 schwarze Exp $ */
1.1 schwarze 2: /*
3: * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
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.
16: */
17: #include <sys/types.h>
18:
19: #include <assert.h>
20: #include <err.h>
21: #include <stdio.h>
22: #include <stdarg.h>
23: #include <stdint.h>
24: #include <stdlib.h>
25: #include <string.h>
26: #include <unistd.h>
27:
28: #include "out.h"
29: #include "chars.h"
30: #include "html.h"
31: #include "main.h"
32:
33: #define UNCONST(a) ((void *)(uintptr_t)(const void *)(a))
34:
35: #define DOCTYPE "-//W3C//DTD HTML 4.01//EN"
36: #define DTD "http://www.w3.org/TR/html4/strict.dtd"
37:
38: struct htmldata {
39: const char *name;
40: int flags;
41: #define HTML_CLRLINE (1 << 0)
42: #define HTML_NOSTACK (1 << 1)
43: };
44:
45: static const struct htmldata htmltags[TAG_MAX] = {
46: {"html", HTML_CLRLINE}, /* TAG_HTML */
47: {"head", HTML_CLRLINE}, /* TAG_HEAD */
48: {"body", HTML_CLRLINE}, /* TAG_BODY */
49: {"meta", HTML_CLRLINE | HTML_NOSTACK}, /* TAG_META */
50: {"title", HTML_CLRLINE}, /* TAG_TITLE */
51: {"div", HTML_CLRLINE}, /* TAG_DIV */
52: {"h1", 0}, /* TAG_H1 */
53: {"h2", 0}, /* TAG_H2 */
54: {"p", HTML_CLRLINE}, /* TAG_P */
55: {"span", 0}, /* TAG_SPAN */
56: {"link", HTML_CLRLINE | HTML_NOSTACK}, /* TAG_LINK */
57: {"br", HTML_CLRLINE | HTML_NOSTACK}, /* TAG_LINK */
58: {"a", 0}, /* TAG_A */
59: {"table", HTML_CLRLINE}, /* TAG_TABLE */
60: {"col", HTML_CLRLINE | HTML_NOSTACK}, /* TAG_COL */
61: {"tr", HTML_CLRLINE}, /* TAG_TR */
62: {"td", HTML_CLRLINE}, /* TAG_TD */
63: {"li", HTML_CLRLINE}, /* TAG_LI */
64: {"ul", HTML_CLRLINE}, /* TAG_UL */
65: {"ol", HTML_CLRLINE}, /* TAG_OL */
66: {"base", HTML_CLRLINE | HTML_NOSTACK}, /* TAG_BASE */
67: };
68:
69: static const char *const htmlattrs[ATTR_MAX] = {
70: "http-equiv",
71: "content",
72: "name",
73: "rel",
74: "href",
75: "type",
76: "media",
77: "class",
78: "style",
79: "width",
80: "valign",
81: "target",
82: "id",
83: };
84:
85: void *
86: html_alloc(char *outopts)
87: {
88: struct html *h;
89: const char *toks[4];
90: char *v;
91:
92: toks[0] = "style";
93: toks[1] = "man";
94: toks[2] = "includes";
95: toks[3] = NULL;
96:
97: if (NULL == (h = calloc(1, sizeof(struct html))))
98: return(NULL);
99:
1.2 ! schwarze 100: h->tags.head = NULL;
! 101: h->ords.head = NULL;
1.1 schwarze 102:
103: if (NULL == (h->symtab = chars_init(CHARS_HTML))) {
104: free(h);
105: return(NULL);
106: }
107:
108: while (outopts && *outopts)
109: switch (getsubopt(&outopts, UNCONST(toks), &v)) {
110: case (0):
111: h->style = v;
112: break;
113: case (1):
114: h->base_man = v;
115: break;
116: case (2):
117: h->base_includes = v;
118: break;
119: default:
120: break;
121: }
122:
123: return(h);
124: }
125:
126:
127: void
128: html_free(void *p)
129: {
130: struct tag *tag;
131: struct ord *ord;
132: struct html *h;
133:
134: h = (struct html *)p;
135:
1.2 ! schwarze 136: while ((ord = h->ords.head) != NULL) {
! 137: h->ords.head = ord->next;
1.1 schwarze 138: free(ord);
139: }
140:
1.2 ! schwarze 141: while ((tag = h->tags.head) != NULL) {
! 142: h->tags.head = tag->next;
1.1 schwarze 143: free(tag);
144: }
145:
146: if (h->symtab)
147: chars_free(h->symtab);
148:
149: free(h);
150: }
151:
152:
153: void
154: print_gen_head(struct html *h)
155: {
156: struct htmlpair tag[4];
157:
158: tag[0].key = ATTR_HTTPEQUIV;
159: tag[0].val = "Content-Type";
160: tag[1].key = ATTR_CONTENT;
161: tag[1].val = "text/html; charset=utf-8";
162: print_otag(h, TAG_META, 2, tag);
163:
164: tag[0].key = ATTR_NAME;
165: tag[0].val = "resource-type";
166: tag[1].key = ATTR_CONTENT;
167: tag[1].val = "document";
168: print_otag(h, TAG_META, 2, tag);
169:
170: if (h->style) {
171: tag[0].key = ATTR_REL;
172: tag[0].val = "stylesheet";
173: tag[1].key = ATTR_HREF;
174: tag[1].val = h->style;
175: tag[2].key = ATTR_TYPE;
176: tag[2].val = "text/css";
177: tag[3].key = ATTR_MEDIA;
178: tag[3].val = "all";
179: print_otag(h, TAG_LINK, 4, tag);
180: }
181: }
182:
183:
184: static void
185: print_spec(struct html *h, const char *p, int len)
186: {
187: const char *rhs;
188: int i;
189: size_t sz;
190:
191: rhs = chars_a2ascii(h->symtab, p, (size_t)len, &sz);
192:
193: if (NULL == rhs)
194: return;
195: for (i = 0; i < (int)sz; i++)
196: putchar(rhs[i]);
197: }
198:
199:
200: static void
201: print_res(struct html *h, const char *p, int len)
202: {
203: const char *rhs;
204: int i;
205: size_t sz;
206:
207: rhs = chars_a2res(h->symtab, p, (size_t)len, &sz);
208:
209: if (NULL == rhs)
210: return;
211: for (i = 0; i < (int)sz; i++)
212: putchar(rhs[i]);
213: }
214:
215:
216: static void
217: print_escape(struct html *h, const char **p)
218: {
219: int j, type;
220: const char *wp;
221:
222: wp = *p;
223: type = 1;
224:
225: if (0 == *(++wp)) {
226: *p = wp;
227: return;
228: }
229:
230: if ('(' == *wp) {
231: wp++;
232: if (0 == *wp || 0 == *(wp + 1)) {
233: *p = 0 == *wp ? wp : wp + 1;
234: return;
235: }
236:
237: print_spec(h, wp, 2);
238: *p = ++wp;
239: return;
240:
241: } else if ('*' == *wp) {
242: if (0 == *(++wp)) {
243: *p = wp;
244: return;
245: }
246:
247: switch (*wp) {
248: case ('('):
249: wp++;
250: if (0 == *wp || 0 == *(wp + 1)) {
251: *p = 0 == *wp ? wp : wp + 1;
252: return;
253: }
254:
255: print_res(h, wp, 2);
256: *p = ++wp;
257: return;
258: case ('['):
259: type = 0;
260: break;
261: default:
262: print_res(h, wp, 1);
263: *p = wp;
264: return;
265: }
266:
267: } else if ('f' == *wp) {
268: if (0 == *(++wp)) {
269: *p = wp;
270: return;
271: }
272:
273: switch (*wp) {
274: case ('B'):
275: /* TODO */
276: break;
277: case ('I'):
278: /* TODO */
279: break;
280: case ('P'):
281: /* FALLTHROUGH */
282: case ('R'):
283: /* TODO */
284: break;
285: default:
286: break;
287: }
288:
289: *p = wp;
290: return;
291:
292: } else if ('[' != *wp) {
293: print_spec(h, wp, 1);
294: *p = wp;
295: return;
296: }
297:
298: wp++;
299: for (j = 0; *wp && ']' != *wp; wp++, j++)
300: /* Loop... */ ;
301:
302: if (0 == *wp) {
303: *p = wp;
304: return;
305: }
306:
307: if (type)
308: print_spec(h, wp - j, j);
309: else
310: print_res(h, wp - j, j);
311:
312: *p = wp;
313: }
314:
315:
316: static void
317: print_encode(struct html *h, const char *p)
318: {
319:
320: for (; *p; p++) {
321: if ('\\' == *p) {
322: print_escape(h, &p);
323: continue;
324: }
325: switch (*p) {
326: case ('<'):
327: printf("<");
328: break;
329: case ('>'):
330: printf(">");
331: break;
332: case ('&'):
333: printf("&");
334: break;
335: default:
336: putchar(*p);
337: break;
338: }
339: }
340: }
341:
342:
343: struct tag *
344: print_otag(struct html *h, enum htmltag tag,
345: int sz, const struct htmlpair *p)
346: {
347: int i;
348: struct tag *t;
349:
350: if ( ! (HTML_NOSTACK & htmltags[tag].flags)) {
351: if (NULL == (t = malloc(sizeof(struct tag))))
352: err(EXIT_FAILURE, "malloc");
353: t->tag = tag;
1.2 ! schwarze 354: t->next = h->tags.head;
! 355: h->tags.head = t;
1.1 schwarze 356: } else
357: t = NULL;
358:
359: if ( ! (HTML_NOSPACE & h->flags))
360: if ( ! (HTML_CLRLINE & htmltags[tag].flags))
361: printf(" ");
362:
363: printf("<%s", htmltags[tag].name);
364: for (i = 0; i < sz; i++) {
365: printf(" %s=\"", htmlattrs[p[i].key]);
366: assert(p->val);
367: print_encode(h, p[i].val);
368: printf("\"");
369: }
370: printf(">");
371:
372: h->flags |= HTML_NOSPACE;
373: if (HTML_CLRLINE & htmltags[tag].flags)
374: h->flags |= HTML_NEWLINE;
375: else
376: h->flags &= ~HTML_NEWLINE;
377:
378: return(t);
379: }
380:
381:
382: /* ARGSUSED */
383: static void
384: print_ctag(struct html *h, enum htmltag tag)
385: {
386:
387: printf("</%s>", htmltags[tag].name);
388: if (HTML_CLRLINE & htmltags[tag].flags)
389: h->flags |= HTML_NOSPACE;
390: if (HTML_CLRLINE & htmltags[tag].flags)
391: h->flags |= HTML_NEWLINE;
392: else
393: h->flags &= ~HTML_NEWLINE;
394: }
395:
396:
397: /* ARGSUSED */
398: void
399: print_gen_doctype(struct html *h)
400: {
401:
402: printf("<!DOCTYPE HTML PUBLIC \"%s\" \"%s\">", DOCTYPE, DTD);
403: }
404:
405:
406: void
407: print_text(struct html *h, const char *p)
408: {
409:
410: if (*p && 0 == *(p + 1))
411: switch (*p) {
412: case('.'):
413: /* FALLTHROUGH */
414: case(','):
415: /* FALLTHROUGH */
416: case(';'):
417: /* FALLTHROUGH */
418: case(':'):
419: /* FALLTHROUGH */
420: case('?'):
421: /* FALLTHROUGH */
422: case('!'):
423: /* FALLTHROUGH */
424: case(')'):
425: /* FALLTHROUGH */
426: case(']'):
427: /* FALLTHROUGH */
428: case('}'):
429: if ( ! (HTML_IGNDELIM & h->flags))
430: h->flags |= HTML_NOSPACE;
431: break;
432: default:
433: break;
434: }
435:
436: if ( ! (h->flags & HTML_NOSPACE))
437: printf(" ");
438:
439: h->flags &= ~HTML_NOSPACE;
440: h->flags &= ~HTML_NEWLINE;
441:
442: if (p)
443: print_encode(h, p);
444:
445: if (*p && 0 == *(p + 1))
446: switch (*p) {
447: case('('):
448: /* FALLTHROUGH */
449: case('['):
450: /* FALLTHROUGH */
451: case('{'):
452: h->flags |= HTML_NOSPACE;
453: break;
454: default:
455: break;
456: }
457: }
458:
459:
460: void
461: print_tagq(struct html *h, const struct tag *until)
462: {
463: struct tag *tag;
464:
1.2 ! schwarze 465: while ((tag = h->tags.head) != NULL) {
1.1 schwarze 466: print_ctag(h, tag->tag);
1.2 ! schwarze 467: h->tags.head = tag->next;
1.1 schwarze 468: free(tag);
469: if (until && tag == until)
470: return;
471: }
472: }
473:
474:
475: void
476: print_stagq(struct html *h, const struct tag *suntil)
477: {
478: struct tag *tag;
479:
1.2 ! schwarze 480: while ((tag = h->tags.head) != NULL) {
1.1 schwarze 481: if (suntil && tag == suntil)
482: return;
483: print_ctag(h, tag->tag);
1.2 ! schwarze 484: h->tags.head = tag->next;
1.1 schwarze 485: free(tag);
486: }
487: }
488:
489:
490: void
491: bufinit(struct html *h)
492: {
493:
494: h->buf[0] = '\0';
495: h->buflen = 0;
496: }
497:
498:
499: void
500: bufcat_style(struct html *h, const char *key, const char *val)
501: {
502:
503: bufcat(h, key);
504: bufncat(h, ":", 1);
505: bufcat(h, val);
506: bufncat(h, ";", 1);
507: }
508:
509:
510: void
511: bufcat(struct html *h, const char *p)
512: {
513:
514: bufncat(h, p, strlen(p));
515: }
516:
517:
518: void
519: buffmt(struct html *h, const char *fmt, ...)
520: {
521: va_list ap;
522:
523: va_start(ap, fmt);
524: (void)vsnprintf(h->buf + (int)h->buflen,
525: BUFSIZ - h->buflen - 1, fmt, ap);
526: va_end(ap);
527: h->buflen = strlen(h->buf);
528: }
529:
530:
531: void
532: bufncat(struct html *h, const char *p, size_t sz)
533: {
534:
535: if (h->buflen + sz > BUFSIZ - 1)
536: sz = BUFSIZ - 1 - h->buflen;
537:
538: (void)strncat(h->buf, p, sz);
539: h->buflen += sz;
540: }
541:
542:
543: void
544: buffmt_includes(struct html *h, const char *name)
545: {
546: const char *p, *pp;
547:
548: pp = h->base_includes;
549:
550: while (NULL != (p = strchr(pp, '%'))) {
551: bufncat(h, pp, (size_t)(p - pp));
552: switch (*(p + 1)) {
553: case('I'):
554: bufcat(h, name);
555: break;
556: default:
557: bufncat(h, p, 2);
558: break;
559: }
560: pp = p + 2;
561: }
562: if (pp)
563: bufcat(h, pp);
564: }
565:
566:
567: void
568: buffmt_man(struct html *h,
569: const char *name, const char *sec)
570: {
571: const char *p, *pp;
572:
573: pp = h->base_man;
574:
575: /* LINTED */
576: while (NULL != (p = strchr(pp, '%'))) {
577: bufncat(h, pp, (size_t)(p - pp));
578: switch (*(p + 1)) {
579: case('S'):
580: bufcat(h, sec ? sec : "1");
581: break;
582: case('N'):
583: buffmt(h, name);
584: break;
585: default:
586: bufncat(h, p, 2);
587: break;
588: }
589: pp = p + 2;
590: }
591: if (pp)
592: bufcat(h, pp);
593: }
594:
595:
596: void
597: bufcat_su(struct html *h, const char *p, const struct roffsu *su)
598: {
599: double v;
600: const char *u;
601:
602: v = su->scale;
603:
604: switch (su->unit) {
605: case (SCALE_CM):
606: u = "cm";
607: break;
608: case (SCALE_IN):
609: u = "in";
610: break;
611: case (SCALE_PC):
612: u = "pc";
613: break;
614: case (SCALE_PT):
615: u = "pt";
616: break;
617: case (SCALE_EM):
618: u = "em";
619: break;
620: case (SCALE_MM):
621: if (0 == (v /= 100))
622: v = 1;
623: u = "em";
624: break;
625: case (SCALE_EN):
626: u = "ex";
627: break;
628: case (SCALE_BU):
629: u = "ex";
630: break;
631: case (SCALE_VS):
632: u = "em";
633: break;
634: default:
635: u = "ex";
636: break;
637: }
638:
639: if (su->pt)
640: buffmt(h, "%s: %f%s;", p, v, u);
641: else
642: /* LINTED */
643: buffmt(h, "%s: %d%s;", p, (int)v, u);
644: }
645: