43341922 |
1 | /* |
2 | * PDF backend for Halibut |
3 | */ |
4 | |
5 | #include <assert.h> |
6 | #include "halibut.h" |
7 | #include "paper.h" |
8 | |
9 | #define TREE_BRANCH 2 /* max branching factor in page tree */ |
10 | |
11 | paragraph *pdf_config_filename(char *filename) |
12 | { |
e4ea58f8 |
13 | return cmdline_cfg_simple("pdf-filename", filename, NULL); |
43341922 |
14 | } |
15 | |
16 | typedef struct object_Tag object; |
17 | typedef struct objlist_Tag objlist; |
18 | |
19 | struct object_Tag { |
20 | objlist *list; |
21 | object *next; |
22 | int number; |
23 | rdstringc main, stream; |
24 | int size, fileoff; |
25 | char *final; |
26 | }; |
27 | |
28 | struct objlist_Tag { |
29 | int number; |
30 | object *head, *tail; |
31 | }; |
32 | |
33 | static object *new_object(objlist *list); |
34 | static void objtext(object *o, char const *text); |
35 | static void objstream(object *o, char const *text); |
7c8c4239 |
36 | static void pdf_string(void (*add)(object *, char const *), |
37 | object *, char const *); |
43341922 |
38 | static void objref(object *o, object *dest); |
39 | |
40 | static void make_pages_node(object *node, object *parent, page_data *first, |
41 | page_data *last, object *resources); |
f0e51ce1 |
42 | static int make_outline(object *parent, outline_element *start, int n, |
43 | int open); |
09358aa7 |
44 | static int pdf_versionid(FILE *fp, word *words); |
43341922 |
45 | |
46 | void pdf_backend(paragraph *sourceform, keywordlist *keywords, |
47 | indexdata *idx, void *vdoc) { |
48 | document *doc = (document *)vdoc; |
49 | int font_index; |
50 | font_encoding *fe; |
51 | page_data *page; |
52 | int pageno; |
53 | FILE *fp; |
54 | char *filename; |
55 | paragraph *p; |
56 | objlist olist; |
57 | object *o, *cat, *outlines, *pages, *resources; |
58 | int fileoff; |
59 | |
60 | IGNORE(keywords); |
61 | IGNORE(idx); |
62 | |
63 | filename = dupstr("output.pdf"); |
64 | for (p = sourceform; p; p = p->next) { |
43341922 |
65 | if (p->type == para_Config && p->parent) { |
66 | if (!ustricmp(p->keyword, L"pdf-filename")) { |
67 | sfree(filename); |
e4ea58f8 |
68 | filename = dupstr(adv(p->origkeyword)); |
43341922 |
69 | } |
70 | } |
71 | } |
72 | |
73 | olist.head = olist.tail = NULL; |
74 | olist.number = 1; |
75 | |
76 | cat = new_object(&olist); |
77 | outlines = new_object(&olist); |
78 | pages = new_object(&olist); |
79 | resources = new_object(&olist); |
80 | |
81 | /* |
43341922 |
82 | * The catalogue just contains references to the outlines and |
83 | * pages objects. |
84 | */ |
85 | objtext(cat, "<<\n/Type /Catalog\n/Outlines "); |
86 | objref(cat, outlines); |
87 | objtext(cat, "\n/Pages "); |
88 | objref(cat, pages); |
f0e51ce1 |
89 | objtext(cat, "\n/PageMode /UseOutlines\n>>\n"); |
43341922 |
90 | |
91 | /* |
92 | * Set up the resources dictionary, which mostly means |
93 | * providing all the font objects and names to call them by. |
94 | */ |
95 | font_index = 0; |
96 | objtext(resources, "<<\n/Font <<\n"); |
97 | for (fe = doc->fonts->head; fe; fe = fe->next) { |
98 | char fname[40]; |
99 | int i; |
100 | object *font; |
101 | |
102 | sprintf(fname, "f%d", font_index++); |
103 | fe->name = dupstr(fname); |
104 | |
105 | font = new_object(&olist); |
106 | |
107 | objtext(resources, "/"); |
108 | objtext(resources, fe->name); |
109 | objtext(resources, " "); |
110 | objref(resources, font); |
111 | objtext(resources, "\n"); |
112 | |
113 | objtext(font, "<<\n/Type /Font\n/Subtype /Type1\n/Name /"); |
114 | objtext(font, fe->name); |
115 | objtext(font, "\n/BaseFont /"); |
116 | objtext(font, fe->font->name); |
117 | objtext(font, "\n/Encoding <<\n/Type /Encoding\n/Differences ["); |
118 | |
119 | for (i = 0; i < 256; i++) { |
120 | char buf[20]; |
121 | if (!fe->vector[i]) |
122 | continue; |
123 | sprintf(buf, "\n%d /", i); |
124 | objtext(font, buf); |
125 | objtext(font, fe->vector[i] ? fe->vector[i] : ".notdef"); |
126 | } |
127 | |
128 | objtext(font, "\n]\n>>\n"); |
129 | |
130 | { |
131 | object *widths = new_object(&olist); |
132 | objtext(font, "/FirstChar 0\n/LastChar 255\n/Widths "); |
133 | objref(font, widths); |
134 | objtext(font, "\n"); |
135 | objtext(widths, "[\n"); |
136 | for (i = 0; i < 256; i++) { |
137 | char buf[80]; |
138 | double width; |
139 | if (fe->indices[i] < 0) |
140 | width = 0.0; |
141 | else |
142 | width = fe->font->widths[fe->indices[i]]; |
143 | sprintf(buf, "%g\n", 1000.0 * width / 4096.0); |
144 | objtext(widths, buf); |
145 | } |
146 | objtext(widths, "]\n"); |
147 | } |
148 | |
149 | objtext(font, ">>\n"); |
150 | } |
151 | objtext(resources, ">>\n>>\n"); |
152 | |
153 | /* |
154 | * Define the page objects for each page, and get each one |
155 | * ready to have a `Parent' specification added to it. |
156 | */ |
157 | for (page = doc->pages; page; page = page->next) { |
158 | object *opage; |
159 | |
160 | opage = new_object(&olist); |
161 | page->spare = opage; |
162 | objtext(opage, "<<\n/Type /Page\n"); |
163 | } |
164 | |
165 | /* |
166 | * Recursively build the page tree. |
167 | */ |
168 | make_pages_node(pages, NULL, doc->pages, NULL, resources); |
169 | |
170 | /* |
171 | * Create and render the individual pages. |
172 | */ |
173 | pageno = 0; |
174 | for (page = doc->pages; page; page = page->next) { |
175 | object *opage, *cstr; |
23765aeb |
176 | rect *r; |
7c8c4239 |
177 | text_fragment *frag, *frag_end; |
43341922 |
178 | char buf[256]; |
7c8c4239 |
179 | int x, y, lx, ly; |
43341922 |
180 | |
181 | opage = (object *)page->spare; |
182 | /* |
183 | * At this point the page dictionary is already |
184 | * half-written, with /Type and /Parent already present. We |
185 | * continue from there. |
186 | */ |
187 | |
188 | /* |
189 | * The PDF spec says /Resources is required, but also says |
190 | * that it's inheritable and may be omitted if it's present |
191 | * in a Pages node. In our case it is: it's present in the |
192 | * topmost /Pages node because we carefully put it there. |
193 | * So we don't need a /Resources entry here. |
194 | */ |
195 | sprintf(buf, "/MediaBox [0 0 %g %g]\n", |
196 | doc->paper_width / 4096.0, doc->paper_height / 4096.0); |
197 | objtext(opage, buf); |
198 | |
199 | /* |
200 | * Now we're ready to define a content stream containing |
201 | * the actual text on the page. |
202 | */ |
203 | cstr = new_object(&olist); |
204 | objtext(opage, "/Contents "); |
205 | objref(opage, cstr); |
206 | objtext(opage, "\n"); |
207 | |
23765aeb |
208 | /* |
209 | * Render any rectangles on the page. |
210 | */ |
211 | for (r = page->first_rect; r; r = r->next) { |
212 | char buf[512]; |
213 | sprintf(buf, "%g %g %g %g re f\n", r->x / 4096.0, |
214 | r->y / 4096.0, r->w / 4096.0, r->h / 4096.0); |
215 | objstream(cstr, buf); |
216 | } |
217 | |
43341922 |
218 | objstream(cstr, "BT\n"); |
43341922 |
219 | |
7c8c4239 |
220 | /* |
221 | * PDF tracks two separate current positions: the position |
222 | * given in the `line matrix' and the position given in the |
223 | * `text matrix'. We must therefore track both as well. |
224 | * They start off at -1 (unset). |
225 | */ |
226 | lx = ly = -1; |
227 | x = y = -1; |
228 | |
229 | frag = page->first_text; |
230 | while (frag) { |
231 | /* |
232 | * For compactness, I'm going to group text fragments |
233 | * into subsequences that use the same font+size. So |
234 | * first find the end of this subsequence. |
235 | */ |
236 | for (frag_end = frag; |
237 | (frag_end && |
238 | frag_end->fe == frag->fe && |
239 | frag_end->fontsize == frag->fontsize); |
240 | frag_end = frag_end->next); |
241 | |
242 | /* |
243 | * Now select the text fragment, and prepare to display |
244 | * the text. |
245 | */ |
43341922 |
246 | objstream(cstr, "/"); |
247 | objstream(cstr, frag->fe->name); |
7c8c4239 |
248 | sprintf(buf, " %d Tf ", frag->fontsize); |
43341922 |
249 | objstream(cstr, buf); |
250 | |
7c8c4239 |
251 | while (frag && frag != frag_end) { |
252 | /* |
253 | * Place the text position for the first piece of |
254 | * text. |
255 | */ |
256 | if (lx < 0) { |
257 | sprintf(buf, "1 0 0 1 %g %g Tm ", |
258 | frag->x/4096.0, frag->y/4096.0); |
259 | } else { |
260 | sprintf(buf, "%g %g Td ", |
261 | (frag->x - lx)/4096.0, (frag->y - ly)/4096.0); |
262 | } |
43341922 |
263 | objstream(cstr, buf); |
7c8c4239 |
264 | lx = x = frag->x; |
265 | ly = y = frag->y; |
266 | |
267 | /* |
268 | * See if we're going to use Tj (show a single |
269 | * string) or TJ (show an array of strings with |
270 | * x-spacings between them). We determine this by |
271 | * seeing if there's more than one text fragment in |
272 | * sequence with the same y-coordinate. |
273 | */ |
274 | if (frag->next && frag->next != frag_end && |
275 | frag->next->y == y) { |
276 | /* |
277 | * The TJ strategy. |
278 | */ |
279 | objstream(cstr, "["); |
280 | while (frag && frag != frag_end && frag->y == y) { |
281 | if (frag->x != x) { |
282 | sprintf(buf, "%g", |
283 | (x - frag->x) * 1000.0 / |
284 | (4096.0 * frag->fontsize)); |
285 | objstream(cstr, buf); |
286 | } |
287 | pdf_string(objstream, cstr, frag->text); |
288 | x = frag->x + frag->width; |
289 | frag = frag->next; |
290 | } |
291 | objstream(cstr, "]TJ\n"); |
292 | } else |
293 | { |
294 | /* |
295 | * The Tj strategy. |
296 | */ |
297 | pdf_string(objstream, cstr, frag->text); |
298 | objstream(cstr, "Tj\n"); |
299 | frag = frag->next; |
300 | } |
43341922 |
301 | } |
43341922 |
302 | } |
303 | objstream(cstr, "ET"); |
304 | |
138d7ffb |
305 | /* |
306 | * Also, we want an annotation dictionary containing the |
307 | * cross-references from this page. |
308 | */ |
309 | if (page->first_xref) { |
310 | xref *xr; |
311 | objtext(opage, "/Annots [\n"); |
312 | |
313 | for (xr = page->first_xref; xr; xr = xr->next) { |
314 | object *annot; |
315 | char buf[256]; |
316 | |
317 | annot = new_object(&olist); |
318 | objref(opage, annot); |
319 | objtext(opage, "\n"); |
320 | |
321 | objtext(annot, "<<\n/Type /Annot\n/Subtype /Link\n/Rect ["); |
322 | sprintf(buf, "%g %g %g %g", |
323 | xr->lx / 4096.0, xr->by / 4096.0, |
324 | xr->rx / 4096.0, xr->ty / 4096.0); |
325 | objtext(annot, buf); |
326 | objtext(annot, "]\n/Border [0 0 0]\n"); |
327 | |
328 | if (xr->dest.type == PAGE) { |
329 | objtext(annot, "/Dest ["); |
330 | objref(annot, (object *)xr->dest.page->spare); |
331 | objtext(annot, " /XYZ null null null]\n"); |
332 | } else { |
7c8c4239 |
333 | objtext(annot, "/A <<\n/Type /Action\n/S /URI\n/URI "); |
334 | pdf_string(objtext, annot, xr->dest.url); |
335 | objtext(annot, "\n>>\n"); |
138d7ffb |
336 | } |
337 | |
338 | objtext(annot, ">>\n"); |
339 | } |
340 | |
341 | objtext(opage, "]\n"); |
342 | } |
343 | |
43341922 |
344 | objtext(opage, ">>\n"); |
345 | } |
346 | |
347 | /* |
f0e51ce1 |
348 | * Set up the outlines dictionary. |
349 | */ |
350 | { |
351 | int topcount; |
352 | char buf[80]; |
353 | |
354 | objtext(outlines, "<<\n/Type /Outlines\n"); |
355 | topcount = make_outline(outlines, doc->outline_elements, |
356 | doc->n_outline_elements, TRUE); |
357 | sprintf(buf, "/Count %d\n>>\n", topcount); |
358 | objtext(outlines, buf); |
359 | } |
360 | |
361 | /* |
43341922 |
362 | * Assemble the final linear form of every object. |
363 | */ |
364 | for (o = olist.head; o; o = o->next) { |
365 | rdstringc rs = {0, 0, NULL}; |
366 | char text[80]; |
367 | |
368 | sprintf(text, "%d 0 obj\n", o->number); |
369 | rdaddsc(&rs, text); |
370 | |
371 | if (!o->main.text && o->stream.text) { |
372 | sprintf(text, "<<\n/Length %d\n>>\n", o->stream.pos); |
373 | rdaddsc(&o->main, text); |
374 | } |
375 | |
376 | assert(o->main.text); |
377 | rdaddsc(&rs, o->main.text); |
378 | sfree(o->main.text); |
379 | |
380 | if (rs.text[rs.pos-1] != '\n') |
381 | rdaddc(&rs, '\n'); |
382 | |
383 | if (o->stream.text) { |
384 | /* |
385 | * FIXME: If we ever start compressing stream data then |
386 | * it will have zero bytes in it, so we'll have to be |
387 | * more careful than this. |
388 | */ |
389 | rdaddsc(&rs, "stream\n"); |
390 | rdaddsc(&rs, o->stream.text); |
391 | rdaddsc(&rs, "\nendstream\n"); |
392 | sfree(o->stream.text); |
393 | } |
394 | |
395 | rdaddsc(&rs, "endobj\n"); |
396 | |
397 | o->final = rs.text; |
398 | o->size = rs.pos; |
399 | } |
400 | |
401 | /* |
402 | * Write out the PDF file. |
403 | */ |
404 | |
405 | fp = fopen(filename, "wb"); |
406 | if (!fp) { |
407 | error(err_cantopenw, filename); |
408 | return; |
409 | } |
410 | |
411 | /* |
09358aa7 |
412 | * Header. I'm going to put the version IDs in the header as |
413 | * well, simply in PDF comments. |
43341922 |
414 | */ |
415 | fileoff = fprintf(fp, "%%PDF-1.3\n"); |
09358aa7 |
416 | for (p = sourceform; p; p = p->next) |
417 | if (p->type == para_VersionID) |
418 | fileoff += pdf_versionid(fp, p->words); |
43341922 |
419 | |
420 | /* |
421 | * Body |
422 | */ |
423 | for (o = olist.head; o; o = o->next) { |
424 | o->fileoff = fileoff; |
425 | fwrite(o->final, 1, o->size, fp); |
426 | fileoff += o->size; |
427 | } |
428 | |
429 | /* |
430 | * Cross-reference table |
431 | */ |
432 | fprintf(fp, "xref\n"); |
433 | assert(olist.head->number == 1); |
434 | fprintf(fp, "0 %d\n", olist.tail->number + 1); |
435 | fprintf(fp, "0000000000 65535 f \n"); |
436 | for (o = olist.head; o; o = o->next) { |
437 | char entry[40]; |
438 | sprintf(entry, "%010d 00000 n \n", o->fileoff); |
439 | assert(strlen(entry) == 20); |
440 | fputs(entry, fp); |
441 | } |
442 | |
443 | /* |
444 | * Trailer |
445 | */ |
446 | fprintf(fp, "trailer\n<<\n/Size %d\n/Root %d 0 R\n>>\n", |
447 | olist.tail->number + 1, cat->number); |
448 | fprintf(fp, "startxref\n%d\n%%%%EOF\n", fileoff); |
449 | |
450 | fclose(fp); |
451 | |
452 | sfree(filename); |
453 | } |
454 | |
455 | static object *new_object(objlist *list) |
456 | { |
457 | object *obj = mknew(object); |
458 | |
459 | obj->list = list; |
460 | |
461 | obj->main.text = NULL; |
462 | obj->main.pos = obj->main.size = 0; |
463 | obj->stream.text = NULL; |
464 | obj->stream.pos = obj->stream.size = 0; |
465 | |
466 | obj->number = list->number++; |
467 | |
468 | obj->next = NULL; |
469 | if (list->tail) |
470 | list->tail->next = obj; |
471 | else |
472 | list->head = obj; |
473 | list->tail = obj; |
474 | |
475 | obj->size = 0; |
476 | obj->final = NULL; |
477 | |
478 | return obj; |
479 | } |
480 | |
481 | static void objtext(object *o, char const *text) |
482 | { |
483 | rdaddsc(&o->main, text); |
484 | } |
485 | |
486 | static void objstream(object *o, char const *text) |
487 | { |
488 | rdaddsc(&o->stream, text); |
489 | } |
490 | |
491 | static void objref(object *o, object *dest) |
492 | { |
493 | char buf[40]; |
494 | sprintf(buf, "%d 0 R", dest->number); |
495 | rdaddsc(&o->main, buf); |
496 | } |
497 | |
498 | static void make_pages_node(object *node, object *parent, page_data *first, |
499 | page_data *last, object *resources) |
500 | { |
501 | int count; |
502 | page_data *page; |
503 | char buf[80]; |
504 | |
505 | objtext(node, "<<\n/Type /Pages\n"); |
506 | if (parent) { |
507 | objtext(node, "/Parent "); |
508 | objref(node, parent); |
509 | objtext(node, "\n"); |
510 | } |
511 | |
512 | /* |
513 | * Count the pages in this stretch, to see if there are few |
514 | * enough to reference directly. |
515 | */ |
516 | count = 0; |
517 | for (page = first; page; page = page->next) { |
518 | count++; |
519 | if (page == last) |
520 | break; |
521 | } |
522 | |
523 | sprintf(buf, "/Count %d\n/Kids [\n", count); |
524 | objtext(node, buf); |
525 | |
526 | if (count > TREE_BRANCH) { |
527 | int i; |
528 | page_data *thisfirst, *thislast; |
529 | |
530 | page = first; |
531 | |
532 | for (i = 0; i < TREE_BRANCH; i++) { |
533 | int number = (i+1) * count / TREE_BRANCH - i * count / TREE_BRANCH; |
534 | thisfirst = page; |
535 | while (number--) { |
536 | thislast = page; |
537 | page = page->next; |
538 | } |
539 | |
540 | if (thisfirst == thislast) { |
541 | objref(node, (object *)thisfirst->spare); |
542 | objtext((object *)thisfirst->spare, "/Parent "); |
543 | objref((object *)thisfirst->spare, node); |
544 | objtext((object *)thisfirst->spare, "\n"); |
545 | } else { |
546 | object *newnode = new_object(node->list); |
547 | make_pages_node(newnode, node, thisfirst, thislast, NULL); |
548 | objref(node, newnode); |
549 | } |
550 | objtext(node, "\n"); |
551 | } |
552 | |
553 | assert(thislast == last || page == NULL); |
554 | |
555 | } else { |
556 | for (page = first; page; page = page->next) { |
557 | objref(node, (object *)page->spare); |
558 | objtext(node, "\n"); |
559 | objtext((object *)page->spare, "/Parent "); |
560 | objref((object *)page->spare, node); |
561 | objtext((object *)page->spare, "\n"); |
562 | if (page == last) |
563 | break; |
564 | } |
565 | } |
566 | |
567 | objtext(node, "]\n"); |
568 | |
569 | if (resources) { |
570 | objtext(node, "/Resources "); |
571 | objref(node, resources); |
572 | objtext(node, "\n"); |
573 | } |
574 | |
575 | objtext(node, ">>\n"); |
576 | } |
f0e51ce1 |
577 | |
578 | /* |
579 | * In text on the page, PDF uses the PostScript font model, which |
580 | * means that glyphs are identified by PS strings and hence font |
581 | * encoding can be managed independently of the supplied encoding |
582 | * of the font. However, in the document outline, the PDF spec |
583 | * simply asks for ordinary text strings without mentioning what |
584 | * character set they are supposed to be interpreted in. |
585 | * |
586 | * Therefore, for the moment, I'm going to assume they're US-ASCII |
587 | * only. If anyone knows better, they should let me know :-/ |
588 | */ |
589 | static int pdf_convert(wchar_t *s, char **result) { |
590 | int doing = (result != 0); |
591 | int ok = TRUE; |
592 | char *p = NULL; |
593 | int plen = 0, psize = 0; |
594 | |
595 | for (; *s; s++) { |
596 | wchar_t c = *s; |
597 | char outc; |
598 | |
599 | if (c >= 32 && c <= 126) { |
600 | /* Char is OK. */ |
601 | outc = (char)c; |
602 | } else { |
603 | /* Char is not OK. */ |
604 | ok = FALSE; |
605 | outc = 0xBF; /* approximate the good old DEC `uh?' */ |
606 | } |
607 | if (doing) { |
608 | if (plen >= psize) { |
609 | psize = plen + 256; |
610 | p = resize(p, psize); |
611 | } |
612 | p[plen++] = outc; |
613 | } |
614 | } |
615 | if (doing) { |
616 | p = resize(p, plen+1); |
617 | p[plen] = '\0'; |
618 | *result = p; |
619 | } |
620 | return ok; |
621 | } |
622 | |
f0e51ce1 |
623 | static int make_outline(object *parent, outline_element *items, int n, |
624 | int open) |
625 | { |
626 | int level, totalcount = 0; |
627 | outline_element *itemp; |
628 | object *curr, *prev = NULL, *first = NULL, *last = NULL; |
f0e51ce1 |
629 | |
630 | assert(n > 0); |
631 | |
632 | level = items->level; |
633 | |
634 | while (n > 0) { |
7c8c4239 |
635 | char *title; |
f0e51ce1 |
636 | |
637 | /* |
638 | * Here we expect to be sitting on an item at the given |
639 | * level. So we start by constructing an outline entry for |
640 | * that item. |
641 | */ |
642 | assert(items->level == level); |
643 | |
be76d597 |
644 | pdf_convert(items->pdata->outline_title, &title); |
f0e51ce1 |
645 | |
646 | totalcount++; |
647 | curr = new_object(parent->list); |
648 | if (!first) first = curr; |
649 | last = curr; |
7c8c4239 |
650 | objtext(curr, "<<\n/Title "); |
651 | pdf_string(objtext, curr, title); |
652 | objtext(curr, "\n/Parent "); |
f0e51ce1 |
653 | objref(curr, parent); |
654 | objtext(curr, "\n/Dest ["); |
be76d597 |
655 | objref(curr, (object *)items->pdata->first->page->spare); |
f0e51ce1 |
656 | objtext(curr, " /XYZ null null null]\n"); |
657 | if (prev) { |
658 | objtext(curr, "/Prev "); |
659 | objref(curr, prev); |
660 | objtext(curr, "\n"); |
661 | |
662 | objtext(prev, "/Next "); |
663 | objref(prev, curr); |
664 | objtext(prev, "\n>>\n"); |
665 | } |
666 | prev = curr; |
667 | |
668 | items++, n--; |
669 | for (itemp = items; itemp < items+n && itemp->level > level; |
670 | itemp++); |
671 | |
672 | if (itemp > items) { |
673 | char buf[80]; |
674 | int count = make_outline(curr, items, itemp - items, FALSE); |
675 | if (!open) |
676 | count = -count; |
677 | else |
678 | totalcount += count; |
679 | sprintf(buf, "/Count %d\n", count); |
680 | objtext(curr, buf); |
681 | } |
682 | |
683 | n -= itemp - items; |
684 | items = itemp; |
685 | } |
686 | objtext(prev, ">>\n"); |
687 | |
688 | assert(first && last); |
689 | objtext(parent, "/First "); |
690 | objref(parent, first); |
691 | objtext(parent, "\n/Last "); |
692 | objref(parent, last); |
693 | objtext(parent, "\n"); |
694 | |
695 | return totalcount; |
696 | } |
09358aa7 |
697 | |
698 | static int pdf_versionid(FILE *fp, word *words) |
699 | { |
700 | int ret; |
701 | |
702 | ret = fprintf(fp, "%% "); |
703 | |
704 | for (; words; words = words->next) { |
705 | char *text; |
706 | int type; |
707 | |
708 | switch (words->type) { |
709 | case word_HyperLink: |
710 | case word_HyperEnd: |
711 | case word_UpperXref: |
712 | case word_LowerXref: |
713 | case word_XrefEnd: |
714 | case word_IndexRef: |
715 | continue; |
716 | } |
717 | |
718 | type = removeattr(words->type); |
719 | |
720 | switch (type) { |
721 | case word_Normal: |
e4ea58f8 |
722 | text = utoa_dup(words->text, CS_ASCII); |
09358aa7 |
723 | break; |
724 | case word_WhiteSpace: |
725 | text = dupstr(" "); |
726 | break; |
727 | case word_Quote: |
728 | text = dupstr("'"); |
729 | break; |
730 | } |
731 | |
732 | fputs(text, fp); |
733 | ret += strlen(text); |
734 | sfree(text); |
735 | } |
736 | |
737 | ret += fprintf(fp, "\n"); |
738 | |
739 | return ret; |
740 | } |
7c8c4239 |
741 | |
742 | static void pdf_string(void (*add)(object *, char const *), |
743 | object *o, char const *str) |
744 | { |
745 | char const *p; |
746 | |
747 | add(o, "("); |
748 | for (p = str; *p; p++) { |
749 | char c[2]; |
750 | if (*p == '\\' || *p == '(' || *p == ')') |
751 | add(o, "\\"); |
752 | c[0] = *p; |
753 | c[1] = '\0'; |
754 | add(o, c); |
755 | } |
756 | add(o, ")"); |
757 | } |