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 *); |
ce1b04aa |
38 | static void pdf_string_len(void (*add)(object *, char const *), |
39 | object *, char const *, int); |
43341922 |
40 | static void objref(object *o, object *dest); |
41 | |
42 | static void make_pages_node(object *node, object *parent, page_data *first, |
43 | page_data *last, object *resources); |
f0e51ce1 |
44 | static int make_outline(object *parent, outline_element *start, int n, |
45 | int open); |
09358aa7 |
46 | static int pdf_versionid(FILE *fp, word *words); |
43341922 |
47 | |
48 | void pdf_backend(paragraph *sourceform, keywordlist *keywords, |
49 | indexdata *idx, void *vdoc) { |
50 | document *doc = (document *)vdoc; |
51 | int font_index; |
52 | font_encoding *fe; |
53 | page_data *page; |
54 | int pageno; |
55 | FILE *fp; |
56 | char *filename; |
57 | paragraph *p; |
58 | objlist olist; |
59 | object *o, *cat, *outlines, *pages, *resources; |
60 | int fileoff; |
61 | |
62 | IGNORE(keywords); |
63 | IGNORE(idx); |
64 | |
65 | filename = dupstr("output.pdf"); |
66 | for (p = sourceform; p; p = p->next) { |
7738a2fb |
67 | if (p->type == para_Config) { |
43341922 |
68 | if (!ustricmp(p->keyword, L"pdf-filename")) { |
69 | sfree(filename); |
e4ea58f8 |
70 | filename = dupstr(adv(p->origkeyword)); |
43341922 |
71 | } |
72 | } |
73 | } |
74 | |
75 | olist.head = olist.tail = NULL; |
76 | olist.number = 1; |
77 | |
78 | cat = new_object(&olist); |
a615a778 |
79 | if (doc->n_outline_elements > 0) |
80 | outlines = new_object(&olist); |
81 | else |
82 | outlines = NULL; |
43341922 |
83 | pages = new_object(&olist); |
84 | resources = new_object(&olist); |
85 | |
86 | /* |
43341922 |
87 | * The catalogue just contains references to the outlines and |
88 | * pages objects. |
89 | */ |
a615a778 |
90 | objtext(cat, "<<\n/Type /Catalog"); |
91 | if (outlines) { |
92 | objtext(cat, "\n/Outlines "); |
93 | objref(cat, outlines); |
94 | } |
43341922 |
95 | objtext(cat, "\n/Pages "); |
96 | objref(cat, pages); |
a615a778 |
97 | if (outlines) |
98 | objtext(cat, "\n/PageMode /UseOutlines"); |
99 | objtext(cat, "\n>>\n"); |
43341922 |
100 | |
101 | /* |
102 | * Set up the resources dictionary, which mostly means |
103 | * providing all the font objects and names to call them by. |
104 | */ |
105 | font_index = 0; |
106 | objtext(resources, "<<\n/Font <<\n"); |
107 | for (fe = doc->fonts->head; fe; fe = fe->next) { |
108 | char fname[40]; |
109 | int i; |
110 | object *font; |
111 | |
112 | sprintf(fname, "f%d", font_index++); |
113 | fe->name = dupstr(fname); |
114 | |
115 | font = new_object(&olist); |
116 | |
117 | objtext(resources, "/"); |
118 | objtext(resources, fe->name); |
119 | objtext(resources, " "); |
120 | objref(resources, font); |
121 | objtext(resources, "\n"); |
122 | |
123 | objtext(font, "<<\n/Type /Font\n/Subtype /Type1\n/Name /"); |
124 | objtext(font, fe->name); |
125 | objtext(font, "\n/BaseFont /"); |
126 | objtext(font, fe->font->name); |
127 | objtext(font, "\n/Encoding <<\n/Type /Encoding\n/Differences ["); |
128 | |
129 | for (i = 0; i < 256; i++) { |
130 | char buf[20]; |
131 | if (!fe->vector[i]) |
132 | continue; |
133 | sprintf(buf, "\n%d /", i); |
134 | objtext(font, buf); |
135 | objtext(font, fe->vector[i] ? fe->vector[i] : ".notdef"); |
136 | } |
137 | |
138 | objtext(font, "\n]\n>>\n"); |
139 | |
140 | { |
141 | object *widths = new_object(&olist); |
142 | objtext(font, "/FirstChar 0\n/LastChar 255\n/Widths "); |
143 | objref(font, widths); |
144 | objtext(font, "\n"); |
145 | objtext(widths, "[\n"); |
146 | for (i = 0; i < 256; i++) { |
147 | char buf[80]; |
148 | double width; |
149 | if (fe->indices[i] < 0) |
150 | width = 0.0; |
151 | else |
152 | width = fe->font->widths[fe->indices[i]]; |
17c71b41 |
153 | sprintf(buf, "%g\n", 1000.0 * width / FUNITS_PER_PT); |
43341922 |
154 | objtext(widths, buf); |
155 | } |
156 | objtext(widths, "]\n"); |
157 | } |
158 | |
159 | objtext(font, ">>\n"); |
160 | } |
161 | objtext(resources, ">>\n>>\n"); |
162 | |
163 | /* |
164 | * Define the page objects for each page, and get each one |
165 | * ready to have a `Parent' specification added to it. |
166 | */ |
167 | for (page = doc->pages; page; page = page->next) { |
168 | object *opage; |
169 | |
170 | opage = new_object(&olist); |
171 | page->spare = opage; |
172 | objtext(opage, "<<\n/Type /Page\n"); |
173 | } |
174 | |
175 | /* |
176 | * Recursively build the page tree. |
177 | */ |
178 | make_pages_node(pages, NULL, doc->pages, NULL, resources); |
179 | |
180 | /* |
181 | * Create and render the individual pages. |
182 | */ |
183 | pageno = 0; |
184 | for (page = doc->pages; page; page = page->next) { |
185 | object *opage, *cstr; |
23765aeb |
186 | rect *r; |
7c8c4239 |
187 | text_fragment *frag, *frag_end; |
43341922 |
188 | char buf[256]; |
7c8c4239 |
189 | int x, y, lx, ly; |
43341922 |
190 | |
191 | opage = (object *)page->spare; |
192 | /* |
193 | * At this point the page dictionary is already |
194 | * half-written, with /Type and /Parent already present. We |
195 | * continue from there. |
196 | */ |
197 | |
198 | /* |
199 | * The PDF spec says /Resources is required, but also says |
200 | * that it's inheritable and may be omitted if it's present |
201 | * in a Pages node. In our case it is: it's present in the |
202 | * topmost /Pages node because we carefully put it there. |
203 | * So we don't need a /Resources entry here. |
204 | */ |
205 | sprintf(buf, "/MediaBox [0 0 %g %g]\n", |
17c71b41 |
206 | doc->paper_width / FUNITS_PER_PT, |
207 | doc->paper_height / FUNITS_PER_PT); |
43341922 |
208 | objtext(opage, buf); |
209 | |
210 | /* |
211 | * Now we're ready to define a content stream containing |
212 | * the actual text on the page. |
213 | */ |
214 | cstr = new_object(&olist); |
215 | objtext(opage, "/Contents "); |
216 | objref(opage, cstr); |
217 | objtext(opage, "\n"); |
218 | |
23765aeb |
219 | /* |
220 | * Render any rectangles on the page. |
221 | */ |
222 | for (r = page->first_rect; r; r = r->next) { |
223 | char buf[512]; |
17c71b41 |
224 | sprintf(buf, "%g %g %g %g re f\n", |
225 | r->x / FUNITS_PER_PT, r->y / FUNITS_PER_PT, |
226 | r->w / FUNITS_PER_PT, r->h / FUNITS_PER_PT); |
23765aeb |
227 | objstream(cstr, buf); |
228 | } |
229 | |
43341922 |
230 | objstream(cstr, "BT\n"); |
43341922 |
231 | |
7c8c4239 |
232 | /* |
233 | * PDF tracks two separate current positions: the position |
234 | * given in the `line matrix' and the position given in the |
235 | * `text matrix'. We must therefore track both as well. |
236 | * They start off at -1 (unset). |
237 | */ |
238 | lx = ly = -1; |
239 | x = y = -1; |
240 | |
241 | frag = page->first_text; |
242 | while (frag) { |
243 | /* |
244 | * For compactness, I'm going to group text fragments |
245 | * into subsequences that use the same font+size. So |
246 | * first find the end of this subsequence. |
247 | */ |
248 | for (frag_end = frag; |
249 | (frag_end && |
250 | frag_end->fe == frag->fe && |
251 | frag_end->fontsize == frag->fontsize); |
252 | frag_end = frag_end->next); |
253 | |
254 | /* |
255 | * Now select the text fragment, and prepare to display |
256 | * the text. |
257 | */ |
43341922 |
258 | objstream(cstr, "/"); |
259 | objstream(cstr, frag->fe->name); |
7c8c4239 |
260 | sprintf(buf, " %d Tf ", frag->fontsize); |
43341922 |
261 | objstream(cstr, buf); |
262 | |
7c8c4239 |
263 | while (frag && frag != frag_end) { |
264 | /* |
265 | * Place the text position for the first piece of |
266 | * text. |
267 | */ |
268 | if (lx < 0) { |
269 | sprintf(buf, "1 0 0 1 %g %g Tm ", |
17c71b41 |
270 | frag->x/FUNITS_PER_PT, frag->y/FUNITS_PER_PT); |
7c8c4239 |
271 | } else { |
272 | sprintf(buf, "%g %g Td ", |
17c71b41 |
273 | (frag->x - lx)/FUNITS_PER_PT, |
274 | (frag->y - ly)/FUNITS_PER_PT); |
7c8c4239 |
275 | } |
43341922 |
276 | objstream(cstr, buf); |
7c8c4239 |
277 | lx = x = frag->x; |
278 | ly = y = frag->y; |
279 | |
280 | /* |
281 | * See if we're going to use Tj (show a single |
282 | * string) or TJ (show an array of strings with |
283 | * x-spacings between them). We determine this by |
284 | * seeing if there's more than one text fragment in |
285 | * sequence with the same y-coordinate. |
286 | */ |
287 | if (frag->next && frag->next != frag_end && |
288 | frag->next->y == y) { |
289 | /* |
290 | * The TJ strategy. |
291 | */ |
292 | objstream(cstr, "["); |
293 | while (frag && frag != frag_end && frag->y == y) { |
294 | if (frag->x != x) { |
295 | sprintf(buf, "%g", |
296 | (x - frag->x) * 1000.0 / |
17c71b41 |
297 | (FUNITS_PER_PT * frag->fontsize)); |
7c8c4239 |
298 | objstream(cstr, buf); |
299 | } |
300 | pdf_string(objstream, cstr, frag->text); |
301 | x = frag->x + frag->width; |
302 | frag = frag->next; |
303 | } |
304 | objstream(cstr, "]TJ\n"); |
305 | } else |
306 | { |
307 | /* |
308 | * The Tj strategy. |
309 | */ |
310 | pdf_string(objstream, cstr, frag->text); |
311 | objstream(cstr, "Tj\n"); |
312 | frag = frag->next; |
313 | } |
43341922 |
314 | } |
43341922 |
315 | } |
316 | objstream(cstr, "ET"); |
317 | |
138d7ffb |
318 | /* |
319 | * Also, we want an annotation dictionary containing the |
320 | * cross-references from this page. |
321 | */ |
322 | if (page->first_xref) { |
323 | xref *xr; |
324 | objtext(opage, "/Annots [\n"); |
325 | |
326 | for (xr = page->first_xref; xr; xr = xr->next) { |
327 | object *annot; |
328 | char buf[256]; |
329 | |
330 | annot = new_object(&olist); |
331 | objref(opage, annot); |
332 | objtext(opage, "\n"); |
333 | |
334 | objtext(annot, "<<\n/Type /Annot\n/Subtype /Link\n/Rect ["); |
335 | sprintf(buf, "%g %g %g %g", |
17c71b41 |
336 | xr->lx / FUNITS_PER_PT, xr->by / FUNITS_PER_PT, |
337 | xr->rx / FUNITS_PER_PT, xr->ty / FUNITS_PER_PT); |
138d7ffb |
338 | objtext(annot, buf); |
339 | objtext(annot, "]\n/Border [0 0 0]\n"); |
340 | |
341 | if (xr->dest.type == PAGE) { |
342 | objtext(annot, "/Dest ["); |
343 | objref(annot, (object *)xr->dest.page->spare); |
344 | objtext(annot, " /XYZ null null null]\n"); |
345 | } else { |
7c8c4239 |
346 | objtext(annot, "/A <<\n/Type /Action\n/S /URI\n/URI "); |
347 | pdf_string(objtext, annot, xr->dest.url); |
348 | objtext(annot, "\n>>\n"); |
138d7ffb |
349 | } |
350 | |
351 | objtext(annot, ">>\n"); |
352 | } |
353 | |
354 | objtext(opage, "]\n"); |
355 | } |
356 | |
43341922 |
357 | objtext(opage, ">>\n"); |
358 | } |
359 | |
360 | /* |
f0e51ce1 |
361 | * Set up the outlines dictionary. |
362 | */ |
a615a778 |
363 | if (outlines) { |
f0e51ce1 |
364 | int topcount; |
365 | char buf[80]; |
366 | |
367 | objtext(outlines, "<<\n/Type /Outlines\n"); |
368 | topcount = make_outline(outlines, doc->outline_elements, |
369 | doc->n_outline_elements, TRUE); |
370 | sprintf(buf, "/Count %d\n>>\n", topcount); |
371 | objtext(outlines, buf); |
372 | } |
373 | |
374 | /* |
43341922 |
375 | * Assemble the final linear form of every object. |
376 | */ |
377 | for (o = olist.head; o; o = o->next) { |
378 | rdstringc rs = {0, 0, NULL}; |
379 | char text[80]; |
380 | |
381 | sprintf(text, "%d 0 obj\n", o->number); |
382 | rdaddsc(&rs, text); |
383 | |
384 | if (!o->main.text && o->stream.text) { |
385 | sprintf(text, "<<\n/Length %d\n>>\n", o->stream.pos); |
386 | rdaddsc(&o->main, text); |
387 | } |
388 | |
389 | assert(o->main.text); |
390 | rdaddsc(&rs, o->main.text); |
391 | sfree(o->main.text); |
392 | |
393 | if (rs.text[rs.pos-1] != '\n') |
394 | rdaddc(&rs, '\n'); |
395 | |
396 | if (o->stream.text) { |
397 | /* |
398 | * FIXME: If we ever start compressing stream data then |
399 | * it will have zero bytes in it, so we'll have to be |
400 | * more careful than this. |
401 | */ |
402 | rdaddsc(&rs, "stream\n"); |
403 | rdaddsc(&rs, o->stream.text); |
404 | rdaddsc(&rs, "\nendstream\n"); |
405 | sfree(o->stream.text); |
406 | } |
407 | |
408 | rdaddsc(&rs, "endobj\n"); |
409 | |
410 | o->final = rs.text; |
411 | o->size = rs.pos; |
412 | } |
413 | |
414 | /* |
415 | * Write out the PDF file. |
416 | */ |
417 | |
418 | fp = fopen(filename, "wb"); |
419 | if (!fp) { |
420 | error(err_cantopenw, filename); |
421 | return; |
422 | } |
423 | |
424 | /* |
09358aa7 |
425 | * Header. I'm going to put the version IDs in the header as |
426 | * well, simply in PDF comments. |
43341922 |
427 | */ |
428 | fileoff = fprintf(fp, "%%PDF-1.3\n"); |
09358aa7 |
429 | for (p = sourceform; p; p = p->next) |
430 | if (p->type == para_VersionID) |
431 | fileoff += pdf_versionid(fp, p->words); |
43341922 |
432 | |
433 | /* |
434 | * Body |
435 | */ |
436 | for (o = olist.head; o; o = o->next) { |
437 | o->fileoff = fileoff; |
438 | fwrite(o->final, 1, o->size, fp); |
439 | fileoff += o->size; |
440 | } |
441 | |
442 | /* |
443 | * Cross-reference table |
444 | */ |
445 | fprintf(fp, "xref\n"); |
446 | assert(olist.head->number == 1); |
447 | fprintf(fp, "0 %d\n", olist.tail->number + 1); |
448 | fprintf(fp, "0000000000 65535 f \n"); |
449 | for (o = olist.head; o; o = o->next) { |
450 | char entry[40]; |
451 | sprintf(entry, "%010d 00000 n \n", o->fileoff); |
452 | assert(strlen(entry) == 20); |
453 | fputs(entry, fp); |
454 | } |
455 | |
456 | /* |
457 | * Trailer |
458 | */ |
459 | fprintf(fp, "trailer\n<<\n/Size %d\n/Root %d 0 R\n>>\n", |
460 | olist.tail->number + 1, cat->number); |
461 | fprintf(fp, "startxref\n%d\n%%%%EOF\n", fileoff); |
462 | |
463 | fclose(fp); |
464 | |
465 | sfree(filename); |
466 | } |
467 | |
468 | static object *new_object(objlist *list) |
469 | { |
f1530049 |
470 | object *obj = snew(object); |
43341922 |
471 | |
472 | obj->list = list; |
473 | |
474 | obj->main.text = NULL; |
475 | obj->main.pos = obj->main.size = 0; |
476 | obj->stream.text = NULL; |
477 | obj->stream.pos = obj->stream.size = 0; |
478 | |
479 | obj->number = list->number++; |
480 | |
481 | obj->next = NULL; |
482 | if (list->tail) |
483 | list->tail->next = obj; |
484 | else |
485 | list->head = obj; |
486 | list->tail = obj; |
487 | |
488 | obj->size = 0; |
489 | obj->final = NULL; |
490 | |
491 | return obj; |
492 | } |
493 | |
494 | static void objtext(object *o, char const *text) |
495 | { |
496 | rdaddsc(&o->main, text); |
497 | } |
498 | |
499 | static void objstream(object *o, char const *text) |
500 | { |
501 | rdaddsc(&o->stream, text); |
502 | } |
503 | |
504 | static void objref(object *o, object *dest) |
505 | { |
506 | char buf[40]; |
507 | sprintf(buf, "%d 0 R", dest->number); |
508 | rdaddsc(&o->main, buf); |
509 | } |
510 | |
511 | static void make_pages_node(object *node, object *parent, page_data *first, |
512 | page_data *last, object *resources) |
513 | { |
514 | int count; |
515 | page_data *page; |
516 | char buf[80]; |
517 | |
518 | objtext(node, "<<\n/Type /Pages\n"); |
519 | if (parent) { |
520 | objtext(node, "/Parent "); |
521 | objref(node, parent); |
522 | objtext(node, "\n"); |
523 | } |
524 | |
525 | /* |
526 | * Count the pages in this stretch, to see if there are few |
527 | * enough to reference directly. |
528 | */ |
529 | count = 0; |
530 | for (page = first; page; page = page->next) { |
531 | count++; |
532 | if (page == last) |
533 | break; |
534 | } |
535 | |
536 | sprintf(buf, "/Count %d\n/Kids [\n", count); |
537 | objtext(node, buf); |
538 | |
539 | if (count > TREE_BRANCH) { |
540 | int i; |
541 | page_data *thisfirst, *thislast; |
542 | |
543 | page = first; |
544 | |
545 | for (i = 0; i < TREE_BRANCH; i++) { |
546 | int number = (i+1) * count / TREE_BRANCH - i * count / TREE_BRANCH; |
547 | thisfirst = page; |
548 | while (number--) { |
549 | thislast = page; |
550 | page = page->next; |
551 | } |
552 | |
553 | if (thisfirst == thislast) { |
554 | objref(node, (object *)thisfirst->spare); |
555 | objtext((object *)thisfirst->spare, "/Parent "); |
556 | objref((object *)thisfirst->spare, node); |
557 | objtext((object *)thisfirst->spare, "\n"); |
558 | } else { |
559 | object *newnode = new_object(node->list); |
560 | make_pages_node(newnode, node, thisfirst, thislast, NULL); |
561 | objref(node, newnode); |
562 | } |
563 | objtext(node, "\n"); |
564 | } |
565 | |
566 | assert(thislast == last || page == NULL); |
567 | |
568 | } else { |
569 | for (page = first; page; page = page->next) { |
570 | objref(node, (object *)page->spare); |
571 | objtext(node, "\n"); |
572 | objtext((object *)page->spare, "/Parent "); |
573 | objref((object *)page->spare, node); |
574 | objtext((object *)page->spare, "\n"); |
575 | if (page == last) |
576 | break; |
577 | } |
578 | } |
579 | |
580 | objtext(node, "]\n"); |
581 | |
582 | if (resources) { |
583 | objtext(node, "/Resources "); |
584 | objref(node, resources); |
585 | objtext(node, "\n"); |
586 | } |
587 | |
588 | objtext(node, ">>\n"); |
589 | } |
f0e51ce1 |
590 | |
591 | /* |
592 | * In text on the page, PDF uses the PostScript font model, which |
593 | * means that glyphs are identified by PS strings and hence font |
594 | * encoding can be managed independently of the supplied encoding |
595 | * of the font. However, in the document outline, the PDF spec |
ce1b04aa |
596 | * encodes in either PDFDocEncoding (a custom superset of |
597 | * ISO-8859-1) or UTF-16BE. |
f0e51ce1 |
598 | */ |
ce1b04aa |
599 | static char *pdf_outline_convert(wchar_t *s, int *len) { |
600 | char *ret; |
601 | |
602 | ret = utoa_careful_dup(s, CS_PDF); |
603 | |
604 | /* |
605 | * Very silly special case: if the returned string begins with |
606 | * FE FF, then the PDF reader will mistake it for a UTF-16BE |
607 | * string. So in this case we give up on PDFDocEncoding and |
608 | * encode it in UTF-16 straight away. |
609 | */ |
610 | if (ret && ret[0] == '\xFE' && ret[1] == '\xFF') { |
611 | sfree(ret); |
612 | ret = NULL; |
f0e51ce1 |
613 | } |
ce1b04aa |
614 | |
615 | if (!ret) { |
616 | ret = utoa_dup_len(s, CS_UTF16BE, len); |
617 | } else { |
618 | *len = strlen(ret); |
f0e51ce1 |
619 | } |
ce1b04aa |
620 | |
621 | return ret; |
f0e51ce1 |
622 | } |
623 | |
f0e51ce1 |
624 | static int make_outline(object *parent, outline_element *items, int n, |
625 | int open) |
626 | { |
627 | int level, totalcount = 0; |
628 | outline_element *itemp; |
629 | object *curr, *prev = NULL, *first = NULL, *last = NULL; |
f0e51ce1 |
630 | |
631 | assert(n > 0); |
632 | |
633 | level = items->level; |
634 | |
635 | while (n > 0) { |
7c8c4239 |
636 | char *title; |
ce1b04aa |
637 | int titlelen; |
f0e51ce1 |
638 | |
639 | /* |
640 | * Here we expect to be sitting on an item at the given |
641 | * level. So we start by constructing an outline entry for |
642 | * that item. |
643 | */ |
644 | assert(items->level == level); |
645 | |
ce1b04aa |
646 | title = pdf_outline_convert(items->pdata->outline_title, &titlelen); |
f0e51ce1 |
647 | |
648 | totalcount++; |
649 | curr = new_object(parent->list); |
650 | if (!first) first = curr; |
651 | last = curr; |
7c8c4239 |
652 | objtext(curr, "<<\n/Title "); |
ce1b04aa |
653 | pdf_string_len(objtext, curr, title, titlelen); |
7c8c4239 |
654 | objtext(curr, "\n/Parent "); |
f0e51ce1 |
655 | objref(curr, parent); |
656 | objtext(curr, "\n/Dest ["); |
be76d597 |
657 | objref(curr, (object *)items->pdata->first->page->spare); |
f0e51ce1 |
658 | objtext(curr, " /XYZ null null null]\n"); |
659 | if (prev) { |
660 | objtext(curr, "/Prev "); |
661 | objref(curr, prev); |
662 | objtext(curr, "\n"); |
663 | |
664 | objtext(prev, "/Next "); |
665 | objref(prev, curr); |
666 | objtext(prev, "\n>>\n"); |
667 | } |
668 | prev = curr; |
669 | |
670 | items++, n--; |
671 | for (itemp = items; itemp < items+n && itemp->level > level; |
672 | itemp++); |
673 | |
674 | if (itemp > items) { |
675 | char buf[80]; |
676 | int count = make_outline(curr, items, itemp - items, FALSE); |
677 | if (!open) |
678 | count = -count; |
679 | else |
680 | totalcount += count; |
681 | sprintf(buf, "/Count %d\n", count); |
682 | objtext(curr, buf); |
683 | } |
684 | |
685 | n -= itemp - items; |
686 | items = itemp; |
687 | } |
688 | objtext(prev, ">>\n"); |
689 | |
690 | assert(first && last); |
691 | objtext(parent, "/First "); |
692 | objref(parent, first); |
693 | objtext(parent, "\n/Last "); |
694 | objref(parent, last); |
695 | objtext(parent, "\n"); |
696 | |
697 | return totalcount; |
698 | } |
09358aa7 |
699 | |
700 | static int pdf_versionid(FILE *fp, word *words) |
701 | { |
702 | int ret; |
703 | |
704 | ret = fprintf(fp, "%% "); |
705 | |
706 | for (; words; words = words->next) { |
707 | char *text; |
708 | int type; |
709 | |
710 | switch (words->type) { |
711 | case word_HyperLink: |
712 | case word_HyperEnd: |
713 | case word_UpperXref: |
714 | case word_LowerXref: |
715 | case word_XrefEnd: |
716 | case word_IndexRef: |
717 | continue; |
718 | } |
719 | |
720 | type = removeattr(words->type); |
721 | |
722 | switch (type) { |
723 | case word_Normal: |
e4ea58f8 |
724 | text = utoa_dup(words->text, CS_ASCII); |
09358aa7 |
725 | break; |
726 | case word_WhiteSpace: |
727 | text = dupstr(" "); |
728 | break; |
729 | case word_Quote: |
730 | text = dupstr("'"); |
731 | break; |
732 | } |
733 | |
734 | fputs(text, fp); |
735 | ret += strlen(text); |
736 | sfree(text); |
737 | } |
738 | |
739 | ret += fprintf(fp, "\n"); |
740 | |
741 | return ret; |
742 | } |
7c8c4239 |
743 | |
ce1b04aa |
744 | static void pdf_string_len(void (*add)(object *, char const *), |
745 | object *o, char const *str, int len) |
7c8c4239 |
746 | { |
747 | char const *p; |
748 | |
749 | add(o, "("); |
ce1b04aa |
750 | for (p = str; len > 0; p++, len--) { |
751 | char c[10]; |
752 | if (*p < ' ' || *p > '~') { |
753 | sprintf(c, "\\%03o", 0xFF & (int)*p); |
754 | } else { |
755 | int n = 0; |
756 | if (*p == '\\' || *p == '(' || *p == ')') |
757 | c[n++] = '\\'; |
758 | c[n++] = *p; |
759 | c[n] = '\0'; |
760 | } |
7c8c4239 |
761 | add(o, c); |
762 | } |
763 | add(o, ")"); |
764 | } |
ce1b04aa |
765 | |
766 | static void pdf_string(void (*add)(object *, char const *), |
767 | object *o, char const *str) |
768 | { |
769 | pdf_string_len(add, o, str, strlen(str)); |
770 | } |